| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.904 | 0.702 | 1.417 | 5.280 |
| Arsenic | As (ppm) | 5.627 | 1.675 | 3.253 | 12.229 |
| Calcium | Ca (wt%) | 0.493 | 1.056 | 0.054 | 7.427 |
| Copper | Cu (ppm) | 11.235 | 5.700 | 5.116 | 46.754 |
| Iron | Fe (wt%) | 1.818 | 0.398 | 1.040 | 3.662 |
| Mercury | Hg (ppm) | 0.051 | 0.014 | 0.017 | 0.105 |
| Magnesium | Mg (wt%) | 0.227 | 0.099 | 0.119 | 0.838 |
| Manganese | Mn (ppm) | 507.316 | 141.194 | 209.820 | 1353.240 |
| Sodium | Na (wt%) | 0.113 | 0.086 | 0.032 | 0.464 |
| Phosphorus | P (wt%) | 0.027 | 0.018 | 0.011 | 0.224 |
| Lead | Pb (ppm) | 24.592 | 13.029 | 10.663 | 165.525 |
| Selenium | Se (ppm) | 0.344 | 0.111 | 0.118 | 0.671 |
| Titanium | Ti (wt%) | 0.272 | 0.060 | 0.153 | 0.484 |
| Zinc | Zn (ppm) | 41.516 | 13.618 | 21.984 | 150.399 |